EP3201519A1 - Lighting system with optimised intensity profile for motor vehicle headlight - Google Patents

Lighting system with optimised intensity profile for motor vehicle headlight

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Publication number
EP3201519A1
EP3201519A1 EP15771975.8A EP15771975A EP3201519A1 EP 3201519 A1 EP3201519 A1 EP 3201519A1 EP 15771975 A EP15771975 A EP 15771975A EP 3201519 A1 EP3201519 A1 EP 3201519A1
Authority
EP
European Patent Office
Prior art keywords
light
type
sources
lighting system
spots
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15771975.8A
Other languages
German (de)
French (fr)
Other versions
EP3201519B1 (en
Inventor
Marine Courcier
Vanesa Sanchez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3201519A1 publication Critical patent/EP3201519A1/en
Application granted granted Critical
Publication of EP3201519B1 publication Critical patent/EP3201519B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16—Laser light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/18—Combination of light sources of different types or shapes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the invention relates to a lighting system such as a projector for a motor vehicle.
  • the first function provides illumination of the entire width of the road in front of the vehicle.
  • the second function provides illumination of the lane in which the vehicle is located and moderate illumination of the lane located next to it and in which vehicles are likely to circulate in opposite directions in order to limit the risk of dazzle.
  • the second lighting function should further limit the risk of glare to the driver of a vehicle traveling on an adjacent lane.
  • an adaptive fire function which makes it possible to illuminate at long distances and to maintain, unlit, selectively and dynamically, certain parts of the scene in front of the vehicle and in particular the vehicles traveling on the adjacent lane.
  • an observation device analyzes the scene and selects the areas that must be kept unlit.
  • the choice of light sources equipping such a system is subject to various constraints, including compliance with the specifications established by the vehicle manufacturer. These specifications generally include a demand for style imposing maximum dimensions for the lighting system and therefore for the optical means for generating the light bands, as well as an ideal profile of the light intensity of the beam according to the light. Horizon angle measured between the direction of emission of a ray considered light beam and the running direction of the vehicle. Compliance with the specifications implies that the intensity profile of the light beam actually generated by the lighting system is greater than or equal to the ideal profile. The ideal profile is approximately in the shape of a bell curve in most of the cases.
  • an immediate solution is to choose all sources of high luminance light capable of forming luminous spots of high luminous intensity.
  • the light beam When all the light sources are fed at their nominal current, the light beam then has a rectangular luminous intensity profile in which is inscribed the ideal profile.
  • the installed power in the lighting system defined as the light power generated in the beam if all the light sources are fed at their rated current, is excessively high.
  • high luminance light sources are generally more expensive than those having a moderate luminance. This means that the lighting system is not overemphasized, which is not optimized, and the cost of producing such a system is unnecessarily increased.
  • An object of the invention is to form a selective beam by means of a lighting system whose operating efficiency is as high as possible, the profile of the beam always corresponding at least to the ideal imposed profile.
  • a lighting system for a motor vehicle for emitting a light beam comprising at least two zones illuminated each generated by at least one light source and optical means arranged to form a light spot from the light emitted by the light source, each spot having a general shape of light strip, in particular of generally rectangular shape,
  • first and second types of light sources the light sources of the same type having substantially the same luminance
  • the luminance of a light source of the first type being 2 to 10 times higher than that of a light source of the second type.
  • the system comprises two types of light sources with significantly different luminances
  • low luminance light sources can be used in areas where the desired light intensity is relatively low, and high luminance light sources in the area. where the desired light intensity is higher.
  • a larger number of light sources operate at a current closer to their nominal current than a system comprising only high luminance light sources. In this way, the utilization efficiency of the system is increased.
  • the luminance of a light source of the first type is 3 to 5 times greater than that of a light source of the second type.
  • This luminance ratio between the two types of light sources makes it possible to obtain a profile of intensity of the light beam that is particularly optimal.
  • the light spots are all of substantially identical shapes and substantially parallel to a common main direction.
  • the light beam thus has a general shape of rectangle and is subdivided into substantially parallel rectangular strips. It is thus easy to control the extinction of the light sources forming the light spots covering the areas to be kept unlit.
  • the light spots are partially superimposed.
  • This increases the light intensity and homogeneity that can be given to the beam with imposed light sources. It also improves the resolution of the light beam, that is to say the smallest zone size of the light beam which is controlled extinction, which improves the dynamic extinction of the areas of the scene to maintain no informed.
  • two consecutive light spots of the light beam are superimposed on half the width of the light spots.
  • the beam comprises at least one zone in which it consists of a regular alternation of spots formed by sources of the first type and spots formed by sources of the second type.
  • a zone of the light beam is thus created in which the intensity is less than that of the light spots formed by the light sources of the first type and greater than that of the light spots formed by the light sources of the second type. This further reduces the power installed in the lighting system while respecting the ideal profile given in the specifications.
  • the light sources of the first type are laser diodes.
  • the light sources of the second type are electroluminescent diodes.
  • the beam comprises, at least one of its two lateral ends, an extended light spot of greater width than that of other light spots.
  • This extended light spot forms an area of the beam that does not usually need to be adjusted. This limits the number of light sources that must include the lighting system, which limits the cost of production of the system.
  • FIG. 1 is a perspective view of a lighting system according to the invention
  • FIG. 2 illustrates the light beam generated by the lighting system of FIG. 1, as it appears on a surface; extending perpendicular to the direction of travel of a vehicle in which the lighting system is mounted,
  • FIG. 3 is a diagram illustrating the arrangement of light spots forming the light beam
  • FIG. 4 is a graph showing, on the one hand, the evolution of the intensity of the light beam as a function of the azimuth of this beam coinciding with the profile of the installed intensity necessary at least to comply with the specifications. , and on the other hand the ideal intensity profile imposed by the specifications to which the profile of the real beam should correspond best, and
  • FIG. 5 illustrates a parameter ⁇ of the lighting system of FIG. 1.
  • FIG. 1 illustrates a lighting system 2 according to the invention mounted on a motor vehicle of which a part of the bodywork 3 has been represented.
  • the lighting system 2 forms the left headlight of the vehicle and has a main axis of the vehicle. lighting system substantially parallel to the direction X.
  • the lighting system 2 comprises at least two lighting modules 4 each comprising at least one light source 6 and optical means 8 arranged to form a light spot 9 to from the light emitted by the light source 6.
  • These lighting modules 4 are known per se. Those skilled in the art will be able to refer to EP-2 278 217 to produce such lighting modules.
  • the system 2 comprises at least two types of light sources, called first and second types of light sources, the light sources 6 of the same type having substantially the same luminance.
  • the light sources 6 of the first type are all laser diodes, and the light sources 6 of the second type are all light emitting diodes.
  • the luminance of each light source 6 of the first type is 2 to 10 times greater than that of each light source 6 of the second type.
  • the luminance of a light source 6 of the first type is more precisely 3 to 5 times greater than that of a light source 6 of the second type.
  • the light sources 6 of the same type form, by means of optical means 8, substantially identical light spots 9, so that we can speak of spots 9 of the first type and spots of the second type.
  • the light sources 6 of the same lighting module 4 can be of the same type, or belong to both types. In the latter case, we will qualify the hybrid module 4.
  • a light beam 14 generated by the lighting system 2 is illustrated in FIG. 2.
  • the light beam 14 is formed by the meeting of the light spots 9 generated by the lighting modules 4.
  • the light spots 9 each have a general shape of light. light band, in particular of generally rectangular shape.
  • the light spots 9 are all of substantially identical shapes and substantially parallel to a common main direction, which is here the vertical direction Z.
  • the light beam 14 is cut into rectangular light strips 9.
  • the lighting system comprises this effect of conventional detection and control members (not shown in the figures). These detection and control organs are respectively capable
  • the beam 14 is completed by a ship-shaped beam, which provides a mood lighting.
  • a superimposition factor k is defined as the value of ⁇ L relative to the angular width of the superposition region of two adjacent light spots 9.
  • a superimposition factor k will preferably be chosen as a non-zero, uniform natural number along the Y axis.
  • the left lateral end of the light beam 14 is formed by an extended light spot 16. This has the particularity of being the only spot of different shape from the other light spots 9, in particular of different dimensions. If it has the same height as the other light spots 9, the extended spot 16 has a width greater than that of other light spots 9 which, it is recalled, have identical shapes and dimensions. In FIG. 3, the extended light spot 16 is located at the left end of the light beam 14.
  • the light beam 14 illustrated being that produced by the lighting system 2 fitted to the left headlight of the vehicle, the extended light spot 16 illuminates outwardly by considering the direction of travel X of the vehicle, that is to say in direction of vehicles capable of traveling in the opposite direction on an adjacent track.
  • the extended spot 16 has a moderate light intensity because it is formed by a light source of the second type. This makes it possible to limit the contrast, in the sense where the light intensity transition between the unlit area and the extended spot 16 is relatively smooth.
  • FIG. 4 shows by a first contour 20 an imposed ideal intensity profile and by a second contour 22 a real intensity profile of the light beam 14 obtained when all the light sources 6 are fed at their nominal current.
  • the profiles 20, 22 represent the evolution of the light intensity as a function of the azimuth a corresponding to the angular width taken with respect to the Z axis. These intensity profiles I are thus measured along the Y axis.
  • the object of the invention is to best match the real profile 22 of the light beam 14 to the ideal profile 20.
  • the ideal profile 20 generally has the shape of a bell curve, but it can be expected that imposes an ideal profile having a completely different shape.
  • the actual profile 22 has the form of a piecewise constant function or slot function. More precisely, the real profile 22 has a central bearing 24 of intensity kl 1; corresponding to the zone of the beam 14 generated by the light sources 6 of the first type. The actual profile 22 also has two lateral bearings 26 of intensity kl 2 , corresponding to the zones of the beam 14 generated by the light sources 6 of the second type. Finally, the actual profile 22 has two intermediate stages 28 of intensity k.sub.i + 2 ) I 2, each extending between the central bearing 24 and one of the two lateral bearings 26. The intermediate bearings 28 correspond to the zones, called mixed, beam 14 in which the beam 14 consists of a regular alternation of spots 9 formed by sources of the first type and spots 9 formed by sources 8 of the second type. However, provision may be made for the intermediate bearings 28 not to exist, so that the central bearing 24 is juxtaposed with the two lateral bearings 26.
  • the values of and ⁇ 2 obviously depend on the luminances of the light sources 6 of the first and second types, but also the style constraints of the specifications and therefore the size imposed for the optical means associated with each type of source.
  • a reduction in the size of the optical means 8 of the lighting modules 4 causes the reduction of the luminous intensity of the light spots 9 formed.
  • all the sources of the same type have a substantially identical intensity I, with manufacturing tolerances, resulting from a combination of the luminance defined for the type of source considered with a given size of optical means, homogeneous, which is the same for all sources of a type.
  • the size of the optical means for the two types of source may be the same or different.
  • the ideal and real profiles 22 as illustrated in FIG. 4 have common points that correspond to an optimized embodiment of the real light beam 14.
  • the method described below aims at dimensioning the lighting system 2 in an optimized manner by determining the minimum number of light sources 6 of the first type, necessary to meet the specifications, in order to minimize the cost and the installed power, that is to say the available power "in reserve” or potentially achievable that is obtained when all sources are powered at their nominal current.
  • the available power "in reserve” or potentially achievable that is obtained when all sources are powered at their nominal current.
  • a parameter ⁇ of the lighting system 2 is notably illustrated in FIG. 5.
  • the parameter ⁇ is the distance between the axis Z and the center of the illuminating pixel in FIG. axis of the lighting system.
  • the center of the pixel is represented by a dashed line 40.
  • angles a x and a 6 delimit the total extent of the zone of the light beam 14 to be covered by means of the light strips 9.
  • angles 2 and 5 define the extent of the area of the light beam 14 for which the intensity required by the specifications is greater than 2I 2 .
  • 21 2 is not sufficient in installed power to meet the specifications. It requires an installed power of I t + I 2 .
  • the angles 3 and 4 define the extent of the zone of the light beam 14 for which the intensity required by the specifications is greater than 1 t + 1 2 .
  • I t + 1 2 is not sufficient in installed power to comply with the specifications. It requires an installed power of 2l x .
  • I max is the maximum value of the intensity of the ideal profile defined by the specifications.
  • This case describes the existence of a zone of the light beam 14 integrally formed by light sources 6 of the first type.
  • the total number of light sources 6 of the second type is given by the sum of the number of sources of the second type in the zone of the light beam entirely formed by sources of the second type and the number of sources of the second type in the mixed zone. Number of sources of the second type in the zone entirely formed by sources of the second type:
  • the total number of light sources 6 of the first type is given by the sum of the number of sources of the first type in the zone entirely formed by sources of the first type and the number of sources of the first type in the mixed zone.
  • This case describes the absence of an area of the light beam 14 integrally formed by light sources 6 of the first type. Total number of sources of the second type.
  • the total number of light sources 6 of the second type is given by the sum of the number of sources of the second type in the zone entirely formed by sources of the second type and the number of sources of the second type in the mixed zone.
  • the total number of light sources 6 of the first type is given by the number of sources of the first type in the mixed zone.
  • the ratio obtained between the numbers of sources of the first and second types makes it possible to optimize the useful power of the lighting system, that is to say the power necessary to reach the specifications in performances.
  • the powers in the various modules have been adjusted in order to "bring the actual profile 22 closer to the intensity profile 20 referred to in the specifications.
  • the lighting system comprises ten modules, -
  • the dimensions of the optical means (and therefore those of the modules) are imposed and are such that the exclusive use of light sources of the first type does not meet the specifications for performance, that is to say match the profile 22 of the light beam 14 to the ideal profile 20 imposed, and
  • the luminous intensity is 35% of that reached by a module of the second type, comprising only sources of the second type, when its light sources 6 are fed at their nominal current.
  • the best current supply of the sources relative to the nominal current is the following: 20%, 37%, 100%, 100%, 100%, 80%, 50%, 34%, 15% and 19%, the last source fueled at 19% forming a vessel veil form ambient light spot .
  • the efficiency of use which is recalled is defined as being the useful power compared to the installed power, is worth 56%.
  • the method of determining the numbers of light sources 6 of the first and second type leads to adopt the following configuration:
  • - source 7 type 1, supplied at 50% of nominal current.
  • - source 8 type 1, supplied at 35% of rated current.
  • the efficiency of use is equal to 74%. It is thus observed that the utilization efficiency is considerably increased by passing from the first configuration to the second configuration. In other words, the power installed in the lighting system is used more optimally.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The invention relates to a lighting system (2) for a motor vehicle, which is intended for emitting a light beam. The beam comprises at least two illuminated areas, each generated by at least one light source (6), and optical means (8) arranged such as to form a light spot from the light emitted by the light source (6), each spot being in the general shape of a rectangular strip of light. The system (2) also includes at least two types of light sources, referred to as first and second types of light source, the light sources (6) of the same type having substantially the same luminance. The luminance of a light source (6) of the first type is two to ten times higher than that of a light source (6) of the second type.

Description

SYSTEME D'ECLAIRAGE A PROFIL D'INTENSITE OPTIMISE POUR PROJECTEUR DE VEHICULE AUTOMOBILE  OPTIMIZED INTENSITY PROFILE LIGHTING SYSTEM FOR MOTOR VEHICLE PROJECTOR
L'invention concerne un système d'éclairage tel qu'un projecteur pour véhicule automobile. The invention relates to a lighting system such as a projector for a motor vehicle.
Il est connu de prévoir sur un véhicule automobile diverses fonctions d'éclairage « feux de route » et une seconde fonction « feux de croisement ». La première fonction fournit un éclairage de toute la largeur de la route devant le véhicule. La seconde fonction fournit un éclairage de la voie dans laquelle se trouve le véhicule et un éclairage modéré de la voie située à côté et dans laquelle des véhicules sont susceptibles de circuler en sens inverse afin de limiter les risques d'éblouissement. Toutefois, il est généralement souhaité que la seconde fonction d'éclairage prévoie de limiter encore plus les risques d'éblouissement du conducteur d'un véhicule circulant sur une voie adjacente. On a donc proposé dans l'état de la technique une fonction de feu adaptatif qui permet d'éclairer à grande distance et de maintenir non éclairées, sélectivement et dynamiquement, certaines parties de la scène située devant le véhicule et en particulier les véhicules circulant sur la voie adjacente. A cette fin, un dispositif d'observation analyse la scène et sélectionne les zones qui doivent être maintenues non éclairées.  It is known to provide a motor vehicle various lighting functions "high beam" and a second function "low beam". The first function provides illumination of the entire width of the road in front of the vehicle. The second function provides illumination of the lane in which the vehicle is located and moderate illumination of the lane located next to it and in which vehicles are likely to circulate in opposite directions in order to limit the risk of dazzle. However, it is generally desired that the second lighting function should further limit the risk of glare to the driver of a vehicle traveling on an adjacent lane. It has therefore been proposed in the state of the art an adaptive fire function which makes it possible to illuminate at long distances and to maintain, unlit, selectively and dynamically, certain parts of the scene in front of the vehicle and in particular the vehicles traveling on the adjacent lane. For this purpose, an observation device analyzes the scene and selects the areas that must be kept unlit.
Pour cela, il est connu notamment de découper fictivement cette scène en plusieurs bandes rectangulaires verticales qui sont éclairées sélectivement suivant les parties de la scène que l'on souhaite éclairer (le même type de fonctionnement peut être mis en œuvre avec une disposition matricielle, c'est-à-dire en colonnes et en lignes, des différentes zones de la scène à éclairer sélectivement). Un tel système est apte à produire un faisceau lumineux sélectif formé par des bandes lumineuses rectangulaires juxtaposées. Un système d'éclairage apte à former une bande lumineuse rectangulaire est par exemple décrit dans le document EP-2 278 217.  For this, it is known in particular to cut this scene fictitiously into several vertical rectangular strips that are selectively illuminated according to the parts of the scene that we wish to illuminate (the same type of operation can be implemented with a matrix arrangement, c 'ie in columns and lines, different areas of the scene to be illuminated selectively). Such a system is capable of producing a selective light beam formed by juxtaposed rectangular light strips. A lighting system capable of forming a rectangular light strip is for example described in EP-2 278 217.
Le choix des sources de lumière équipant un tel système est soumis à différentes contraintes, notamment le respect du cahier des charges établi par le constructeur du véhicule. Ce cahier des charges comprend généralement une demande de style imposant des dimensions maximales pour le système d'éclairage et donc pour les moyens optiques destinés à générer les bandes lumineuses, ainsi qu'un profil idéal de l'intensité lumineuse du faisceau en fonction de l'angle horizontal mesuré entre la direction d'émission d'un rayon considéré du faisceau lumineux et la direction de marche du véhicule. Le respect du cahier des charges implique que le profil en intensité du faisceau lumineux réellement généré par le système d'éclairage soit supérieur ou égal au profil idéal. Le profil idéal a approximativement la forme d'une courbe en cloche dans la plupart des cas. The choice of light sources equipping such a system is subject to various constraints, including compliance with the specifications established by the vehicle manufacturer. These specifications generally include a demand for style imposing maximum dimensions for the lighting system and therefore for the optical means for generating the light bands, as well as an ideal profile of the light intensity of the beam according to the light. horizontal angle measured between the direction of emission of a ray considered light beam and the running direction of the vehicle. Compliance with the specifications implies that the intensity profile of the light beam actually generated by the lighting system is greater than or equal to the ideal profile. The ideal profile is approximately in the shape of a bell curve in most of the cases.
Afin de respecter cette contrainte, une solution immédiate est de choisir toutes les sources de lumière de forte luminance, capables de former des taches lumineuses de forte intensité lumineuse. Lorsque toutes les sources de lumière sont alimentées à leur courant nominal, le faisceau lumineux a alors un profil en intensité lumineuse rectangulaire dans lequel est inscrit le profil idéal. Cependant, dans cette solution, la puissance installée dans le système d'éclairage, définie comme étant la puissance lumineuse générée dans le faisceau si toutes les sources de lumière sont alimentées à leur courant nominal, est excessivement élevée. Or, les sources de lumière à forte luminance sont généralement plus onéreuses que celles ayant une luminance modérée. Cela signifie qu'on surdimmensionne vainement le système d'éclairage, qui n'est ainsi pas optimisé, et que le coût de production d'un tel système est inutilement accru.  In order to respect this constraint, an immediate solution is to choose all sources of high luminance light capable of forming luminous spots of high luminous intensity. When all the light sources are fed at their nominal current, the light beam then has a rectangular luminous intensity profile in which is inscribed the ideal profile. However, in this solution, the installed power in the lighting system, defined as the light power generated in the beam if all the light sources are fed at their rated current, is excessively high. However, high luminance light sources are generally more expensive than those having a moderate luminance. This means that the lighting system is not overemphasized, which is not optimized, and the cost of producing such a system is unnecessarily increased.
De plus, un tel profil rectangulaire génère un contraste très important en luminosité aux extrémités latérales du faisceau, ce qui gêne la vision de la scène pour le conducteur. En effet, dans ce cas, aux extrémités latérales du faisceau, l'intensité lumineuse passe brutalement d'une valeur très élevée à une valeur presque nulle sur une faible plage angulaire. Pour pallier ce problème, on peut alimenter les sources de lumière destinées à former les taches lumineuses des bords du faisceau par un courant notablement inférieur au courant nominal, de sorte que le contraste soit atténué et que les transitions d'intensité lumineuses soient moins abruptes. Mais cela engendre une chute du rendement d'utilisation du système, qui est défini comme étant le rapport de la puissance lumineuse générée par le faisceau sur la puissance installée. Il est en effet intéressant d'alimenter un nombre maximal de sources de lumière avec un courant le plus proche possible de leur courant nominal. Par ailleurs, cette solution ne permet pas de résoudre le problème du surdimmensionnement inutile du système d'éclairage. In addition, such a rectangular profile generates a very significant contrast in brightness at the lateral ends of the beam, which hinders the vision of the scene for the driver. Indeed, in this case, at the lateral ends of the beam, the light intensity suddenly changes from a very high value to a value almost zero over a small angular range. To overcome this problem, it is possible to feed the light sources intended to form the light spots of the beam edges with a current significantly lower than the nominal current, so that the contrast is attenuated and the light intensity transitions are less abrupt. But this results in a fall in the efficiency of use of the system, which is defined as the ratio of the light power generated by the beam on the installed power. It is indeed interesting to feed a maximum number of light sources with a current as close as possible to their nominal current. Moreover, this solution does not solve the problem of unnecessary overshoot of the lighting system.
On pourrait alors envisager d'imposer que toutes les sources de lumière soient du type de luminance modérée, telles que des diodes électroluminescentes. Mais cela n'est pas une condition suffisante pour respecter le cahier des charges, en particulier lorsque les dimensions des moyens optiques associés aux sources de lumière sont limitées par le style ou encore, lorsque le profil idéal d'intensité à atteindre est trop élevé. Cette solution n'est donc pas satisfaisante. It could then be envisaged to impose that all the light sources are of the type of moderate luminance, such as light-emitting diodes. But this is not a sufficient condition to meet the specifications, especially when the dimensions of the optical means associated with the light sources are limited by the style or, when the ideal profile of intensity to be achieved is too high. This solution is therefore not satisfactory.
Un but de l'invention est de former un faisceau sélectif au moyen d'un système d'éclairage dont le rendement d'utilisation est le plus élevé possible, le profil du faisceau correspondant toujours au moins au profil idéal imposé.  An object of the invention is to form a selective beam by means of a lighting system whose operating efficiency is as high as possible, the profile of the beam always corresponding at least to the ideal imposed profile.
A cet effet, on prévoit selon l'invention un système d'éclairage pour véhicule automobile, pour émettre un faisceau lumineux comprenant au moins deux zones éclairées chacune générée par au moins une source de lumière et des moyens optiques agencés de manière à former une tache lumineuse à partir de la lumière émise par la source de lumière, chaque tache ayant une forme générale de bande lumineuse, notamment de forme générale rectangulaire, For this purpose, it is provided according to the invention a lighting system for a motor vehicle, for emitting a light beam comprising at least two zones illuminated each generated by at least one light source and optical means arranged to form a light spot from the light emitted by the light source, each spot having a general shape of light strip, in particular of generally rectangular shape,
remarquable en ce qu'il comprend au moins deux types de sources de lumière, appelés premier et deuxième types de sources de lumière, les sources de lumière d'un même type ayant sensiblement une même luminance, et  remarkable in that it comprises at least two types of light sources, called first and second types of light sources, the light sources of the same type having substantially the same luminance, and
la luminance d'une source de lumière du premier type étant 2 à 10 fois supérieure à celle d'une source de lumière du deuxième type.  the luminance of a light source of the first type being 2 to 10 times higher than that of a light source of the second type.
Ainsi, le système comprenant deux types de sources de lumière à luminances notablement différentes, on peut utiliser des sources de lumière à faible luminance dans les zones où l'intensité lumineuse désirée est relativement faible, et des sources de lumière à forte luminance dans la zone où l'intensité lumineuse désirée est plus élevée. Cela permet réduire la puissance installée dans le système d'éclairage, tout en respectant le profil idéal donné dans le cahier des charges. De plus, un plus grand nombre de sources de lumière fonctionne à un courant plus proche de leur courant nominal par rapport à un système comprenant uniquement des sources de lumière à forte luminance. On augmente de cette manière le rendement d'utilisation du système. Avantageusement, la luminance d'une source de lumière du premier type est 3 à 5 fois supérieure à celle d'une source de lumière du deuxième type.  Thus, since the system comprises two types of light sources with significantly different luminances, low luminance light sources can be used in areas where the desired light intensity is relatively low, and high luminance light sources in the area. where the desired light intensity is higher. This reduces the installed power in the lighting system, while respecting the ideal profile given in the specifications. In addition, a larger number of light sources operate at a current closer to their nominal current than a system comprising only high luminance light sources. In this way, the utilization efficiency of the system is increased. Advantageously, the luminance of a light source of the first type is 3 to 5 times greater than that of a light source of the second type.
Ce rapport de luminances entre les deux types de sources de lumière permet d'obtenir un profil en intensité du faisceau lumineux particulièrement optimal.  This luminance ratio between the two types of light sources makes it possible to obtain a profile of intensity of the light beam that is particularly optimal.
Avantageusement, les taches lumineuses sont toutes de formes sensiblement identiques et sensiblement parallèles à une direction principale commune.  Advantageously, the light spots are all of substantially identical shapes and substantially parallel to a common main direction.
Le faisceau lumineux a ainsi une forme générale de rectangle et est subdivisé en bandes rectangulaires sensiblement parallèles. On commande ainsi aisément l'extinction des sources de lumière formant les taches lumineuses couvrant les zones à maintenir non éclairées.  The light beam thus has a general shape of rectangle and is subdivided into substantially parallel rectangular strips. It is thus easy to control the extinction of the light sources forming the light spots covering the areas to be kept unlit.
De préférence, les taches lumineuses se superposent partiellement.  Preferably, the light spots are partially superimposed.
On augmente ainsi l'intensité lumineuse et l'homogénéité que l'on peut donner au faisceau avec des sources de lumière imposées. On améliore également la résolution du faisceau lumineux, c'est-à-dire la plus petite taille de zone du faisceau lumineux dont on maîtrise l'extinction, ce qui permet d'améliorer l'extinction dynamique des zones de la scène à maintenir non éclairées.  This increases the light intensity and homogeneity that can be given to the beam with imposed light sources. It also improves the resolution of the light beam, that is to say the smallest zone size of the light beam which is controlled extinction, which improves the dynamic extinction of the areas of the scene to maintain no informed.
De préférence, deux taches lumineuses consécutives du faisceau lumineux se superposent sur la moitié de la largeur des taches lumineuses.  Preferably, two consecutive light spots of the light beam are superimposed on half the width of the light spots.
Ainsi, on définit une large zone du faisceau dans laquelle en tout point, deux taches lumineuses se superposent pour augmenter l'intensité du faisceau lumineux. Thus, we define a broad zone of the beam in which in every point, two spots lights are superimposed to increase the intensity of the light beam.
Avantageusement, le faisceau comprend au moins une zone dans laquelle il est constitué d'une alternance régulière de taches formées par des sources du premier type et de taches formées par des sources du deuxième type.  Advantageously, the beam comprises at least one zone in which it consists of a regular alternation of spots formed by sources of the first type and spots formed by sources of the second type.
On crée ainsi une zone du faisceau lumineux dans laquelle l'intensité est inférieure à celle des taches lumineuses formées par les sources de lumières du premier type et supérieure à celle des taches lumineuses formées par les sources de lumière du deuxième type. Cela permet de réduire davantage la puissance installée dans le système d'éclairage tout en respectant le profil idéal donné dans le cahier des charges. Avantageusement, les sources de lumière du premier type sont des diodes laser. A zone of the light beam is thus created in which the intensity is less than that of the light spots formed by the light sources of the first type and greater than that of the light spots formed by the light sources of the second type. This further reduces the power installed in the lighting system while respecting the ideal profile given in the specifications. Advantageously, the light sources of the first type are laser diodes.
Avantageusement, les sources de lumière du deuxième type sont des diodes électroluminescentes. Advantageously, the light sources of the second type are electroluminescent diodes.
Ces sources de lumière permettent de former les deux types de sources de lumière respectant la différence de luminance définie plus haut.  These light sources make it possible to form the two types of light sources respecting the difference in luminance defined above.
Avantageusement, le faisceau comprend, à au moins une de ses deux extrémités latérales, une tache lumineuse étendue de largeur supérieure à celle des autres taches lumineuses.  Advantageously, the beam comprises, at least one of its two lateral ends, an extended light spot of greater width than that of other light spots.
Cette tache lumineuse étendue forme une zone du faisceau dont il n'est habituellement pas besoin de régler l'intensité. On limite ainsi le nombre de sources de lumière que doit comprendre le système d'éclairage, ce qui permet de limiter le coût de production du système.  This extended light spot forms an area of the beam that does not usually need to be adjusted. This limits the number of light sources that must include the lighting system, which limits the cost of production of the system.
L'invention sera mieux comprise à la lecture de la description qui va suivre donnée uniquement à titre d'exemple et faite en référence aux dessins dans lesquels :  The invention will be better understood on reading the following description given solely by way of example and with reference to the drawings in which:
- la figure 1 est une vue en perspective d'un système d'éclairage selon l'invention, - la figure 2 illustre le faisceau lumineux généré par le système d'éclairage de la figure 1 , tel qu'il apparaît sur une surface s'étendant perpendiculairement à la direction de déplacement d'un véhicule dans lequel le système d'éclairage est monté,  FIG. 1 is a perspective view of a lighting system according to the invention; FIG. 2 illustrates the light beam generated by the lighting system of FIG. 1, as it appears on a surface; extending perpendicular to the direction of travel of a vehicle in which the lighting system is mounted,
- la figure 3 est un schéma illustrant l'agencement de taches lumineuses formant le faisceau lumineux,  FIG. 3 is a diagram illustrating the arrangement of light spots forming the light beam,
- la figure 4 est un graphique montrant d'une part, l'évolution de l'intensité du faisceau lumineux en fonction de l'azimut de ce faisceau coïncidant avec le profil de l'intensité installée nécessaire au minimum pour respecter le cahier des charges, et d'autre part le profil d'intensité idéal imposé par le cahier des charges auquel le profil du faisceau réel doit correspondre au mieux, et  FIG. 4 is a graph showing, on the one hand, the evolution of the intensity of the light beam as a function of the azimuth of this beam coinciding with the profile of the installed intensity necessary at least to comply with the specifications. , and on the other hand the ideal intensity profile imposed by the specifications to which the profile of the real beam should correspond best, and
- la figure 5 illustre un paramètre Δ du système d'éclairage de la figure 1 .  FIG. 5 illustrates a parameter Δ of the lighting system of FIG. 1.
Dans ce qui suit, on considère un repère orthogonal R (O, x, y, z) associé à un véhicule automobile, dans lequel O est un point du véhicule, x et y sont les coordonnées le long des axes horizontaux X et Y, correspondant respectivement à la direction de déplacement du véhicule et à la direction perpendiculaire à celle-ci, et z est la coordonnée le long de l'axe Z vertical. In what follows, we consider an orthogonal reference R (O, x, y, z) associated with a motor vehicle, where O is a point of the vehicle, x and y are the coordinates along the horizontal axes X and Y, respectively corresponding to the direction of movement of the vehicle and the direction perpendicular to it, and z is the coordinate along the vertical axis Z.
On a illustré en figure 1 un système d'éclairage 2 selon l'invention monté sur un véhicule automobile dont on a représenté une partie de la carrosserie 3. Le système d'éclairage 2 forme le projecteur gauche du véhicule et présente un axe principal du système d'éclairage sensiblement parallèle à la direction X. Le système d'éclairage 2 comprend au moins deux modules d'éclairage 4 comportant chacun au moins une source de lumière 6 et des moyens optiques 8 agencés de manière à former une tache lumineuse 9 à partir de la lumière émise par la source de lumière 6. Ces modules d'éclairage 4 sont connus en soi. L'homme du métier pourra se référer à EP-2 278 217 pour réaliser de tels modules d'éclairage.  FIG. 1 illustrates a lighting system 2 according to the invention mounted on a motor vehicle of which a part of the bodywork 3 has been represented. The lighting system 2 forms the left headlight of the vehicle and has a main axis of the vehicle. lighting system substantially parallel to the direction X. The lighting system 2 comprises at least two lighting modules 4 each comprising at least one light source 6 and optical means 8 arranged to form a light spot 9 to from the light emitted by the light source 6. These lighting modules 4 are known per se. Those skilled in the art will be able to refer to EP-2 278 217 to produce such lighting modules.
Le système 2 comprend au moins deux types de sources de lumière, appelés premier et deuxième types de sources de lumière, les sources de lumière 6 d'un même type ayant sensiblement une même luminance. Les sources de lumière 6 du premier type sont toutes des diodes laser, et les sources de lumière 6 du deuxième type sont toutes des diodes électroluminescentes. De la sorte, la luminance de chaque source de lumière 6 du premier type est 2 à 10 fois supérieure à celle de chaque source de lumière 6 du deuxième type. La luminance d'une source de lumière 6 du premier type est plus précisément 3 à 5 fois supérieure à celle d'une source de lumière 6 du deuxième type. On pourra toutefois prévoir d'utiliser des sources de lumière 6 différentes de celles énoncées ci-dessus. Les sources de lumière 6 d'un même type forment, grâce au moyens optiques 8, des taches lumineuses 9 sensiblement identiques, si bien que l'on peut parler de taches 9 du premier type et de taches du deuxième type. On verra dans la suite pourquoi il est intéressant que le système d'éclairage 2 comporte les deux types de sources de lumière. Les sources de lumière 6 d'un même module d'éclairage 4 peuvent être du même type, ou bien appartenir aux deux types. Dans ce dernier cas, on qualifiera le module 4 d'hybride.  The system 2 comprises at least two types of light sources, called first and second types of light sources, the light sources 6 of the same type having substantially the same luminance. The light sources 6 of the first type are all laser diodes, and the light sources 6 of the second type are all light emitting diodes. In this way, the luminance of each light source 6 of the first type is 2 to 10 times greater than that of each light source 6 of the second type. The luminance of a light source 6 of the first type is more precisely 3 to 5 times greater than that of a light source 6 of the second type. However, it will be possible to use light sources 6 different from those mentioned above. The light sources 6 of the same type form, by means of optical means 8, substantially identical light spots 9, so that we can speak of spots 9 of the first type and spots of the second type. We will see in the following why it is interesting that the lighting system 2 has both types of light sources. The light sources 6 of the same lighting module 4 can be of the same type, or belong to both types. In the latter case, we will qualify the hybrid module 4.
Un faisceau lumineux 14 généré par le système d'éclairage 2 est illustré en figure 2. Le faisceau lumineux 14 est formé par la réunion des taches lumineuses 9 générées par les modules d'éclairage 4. Les taches lumineuses 9 ont chacune une forme générale de bande lumineuse, notamment de forme générale rectangulaire. Les taches lumineuses 9 sont toutes de formes sensiblement identiques et sensiblement parallèles à une direction principale commune, qui est ici la direction verticale Z.  A light beam 14 generated by the lighting system 2 is illustrated in FIG. 2. The light beam 14 is formed by the meeting of the light spots 9 generated by the lighting modules 4. The light spots 9 each have a general shape of light. light band, in particular of generally rectangular shape. The light spots 9 are all of substantially identical shapes and substantially parallel to a common main direction, which is here the vertical direction Z.
Le faisceau lumineux 14 est découpé en bandes lumineuses rectangulaires 9. Afin qu'il forme un faisceau sélectif, c'est-à-dire apte à maintenir non éclairées certaines zones de la scène éclairée devant le véhicule, le système d'éclairage comprend à cet effet des organes classiques de détection et de commande (non représentés sur les figures). Ces organes de détection et de commande sont respectivement aptes The light beam 14 is cut into rectangular light strips 9. In order to form a selective beam, that is to say able to keep certain areas of the illuminated scene in front of the vehicle unlit, the lighting system comprises this effect of conventional detection and control members (not shown in the figures). These detection and control organs are respectively capable
- à détecter des zones de la scène devant le véhicule à maintenir non éclairées, et - to detect areas of the scene in front of the vehicle to maintain unlit, and
- à commander les sources de lumière 6 afin d'éteindre celles formant les taches lumineuses 9 couvrant les zones à maintenir non éclairées. On réalise de la sorte un faisceau lumineux 14 dit sélectif. - Control the light sources 6 to turn off those forming the light spots 9 covering the areas to keep unlit. In this way, a so-called selective light beam 14 is produced.
Comme illustré dans la figure 2, le faisceau 14 est complété par un faisceau en forme de voile de navire, qui fournit un éclairage d'ambiance.  As illustrated in FIG. 2, the beam 14 is completed by a ship-shaped beam, which provides a mood lighting.
En référence à la figure 3, les taches lumineuses 9 du faisceau lumineux 14 se superposent partiellement. On suppose ici que toutes les taches lumineuses 9 sont toutes de forme générale rectangulaire et de dimensions sensiblement identiques, les bords de taches lumineuses étant légèrement flous, et que la superposition est régulière. Cela signifie que toute tache 9 présente une largeur angulaire, prise par rapport à l'axe Z, a = aL prédéterminée, et définie habituellement comme étant sensiblement égale à la largeur à mi-hauteur du profil d'intensité de la tache 9, à la dimension du flou entourant les taches lumineuses 9 près, et que quelque soient deux taches lumineuses 9 adjacentes, la largeur d'une région de superposition de ces deux taches adjacentes 9 dans le faisceau 14 prend une valeur prédéterminée fixée. On définit un facteur de superposition k, comme étant la valeur de aL rapportée à la largeur angulaire de la région de superposition de deux taches lumineuses 9 adjacentes. On choisira préférentiellement un facteur de superposition k comme étant un entier naturel non nul et uniforme le long de l'axe Y. With reference to FIG. 3, the light spots 9 of the light beam 14 overlap partially. It is assumed here that all the light spots 9 are all of a generally rectangular shape and of substantially identical dimensions, the edges of light spots being slightly fuzzy, and that the superposition is regular. This means that any spot 9 has an angular width, taken with respect to the axis Z, a = a predetermined L , and usually defined as being substantially equal to the width at mid-height of the intensity profile of the spot 9, to the size of the blur surrounding the light spots 9, and regardless of any two adjacent light spots 9, the width of a superposition region of these two adjacent spots 9 in the beam 14 assumes a fixed predetermined value. A superimposition factor k is defined as the value of α L relative to the angular width of the superposition region of two adjacent light spots 9. A superimposition factor k will preferably be chosen as a non-zero, uniform natural number along the Y axis.
Le fait de choisir une valeur de k entière et strictement supérieure à 1 présente l'avantage d'améliorer la résolution du faisceau lumineux 14, c'est-à-dire de réduire la la valeur du paramètre β. Ce paramètre β est défini par la largeur de la plus petite zone du faisceau 14 dont on peut maîtriser l'extinction au moyen de l'organe de commande. En d'autres termes, β est égal à la largeur angulaire d'un pixel du faisceau lumineux 14. Lorsque k est choisi entier, la valeur du paramètre β est égale à la valeur de aL rapporté au facteur de superposition k. The fact of choosing a value of k whole and strictly greater than 1 has the advantage of improving the resolution of the light beam 14, that is to say of reducing the value of the parameter β. This parameter β is defined by the width of the smallest zone of the beam 14, the extinction of which can be controlled by means of the control member. In other words, β is equal to the angular width of a pixel of the light beam 14. When k is chosen to be integer, the value of the parameter β is equal to the value of a L relative to the superposition factor k.
Dans l'exemple représenté en figure 3, deux taches lumineuses 9 consécutives du faisceau lumineux 14 se superposent sur la moitié de la largeur angulaire aL des taches lumineuses 9. En d'autres termes, k = 2 et β = aL / 2. A titre d'exemple, le cas k = 1 correspondrait au cas où les taches lumineuses 9 seraient contiguës. In the example shown in FIG. 3, two consecutive light spots 9 of the light beam 14 are superimposed on half the angular width a L of the light spots 9. In other words, k = 2 and β = a L / 2 By way of example, the case k = 1 corresponds to the case where the light spots 9 are contiguous.
L'extrémité latérale gauche du faisceau lumineux 14 est formée par une tache lumineuse étendue 16. Celle-ci a la particularité d'être la seule tache de forme différente des autres taches lumineuses 9, notamment de dimensions différentes. Si elle présente la même hauteur que les autres taches lumineuses 9, la tache étendue 16 présente une largeur supérieure à celle des autre taches lumineuses 9 qui, on le rappelle, présentent des formes et des dimensions identiques. Sur la figure 3, la tache lumineuse étendue 16 est située à l'extrémité gauche du faisceau lumineux 14. The left lateral end of the light beam 14 is formed by an extended light spot 16. This has the particularity of being the only spot of different shape from the other light spots 9, in particular of different dimensions. If it has the same height as the other light spots 9, the extended spot 16 has a width greater than that of other light spots 9 which, it is recalled, have identical shapes and dimensions. In FIG. 3, the extended light spot 16 is located at the left end of the light beam 14.
Le faisceau lumineux 14 illustré étant celui réalisé par le système d'éclairage 2 équipant le projecteur gauche du véhicule, la tache lumineuse étendue 16 éclaire vers l'extérieur en considérant la direction de déplacement X du véhicule, c'est-à-dire en direction de véhicules pouvant circuler en sens inverse sur une voie adjacente. De plus, la tache étendue 16 présente une intensité lumineuse modérée, car elle est formée par une source de lumière du deuxième type. Cela permet de limiter le contraste, au sens ou la transition d'intensité lumineuse entre la zone non éclairée et la tache étendue 16 est relativement douce.  The light beam 14 illustrated being that produced by the lighting system 2 fitted to the left headlight of the vehicle, the extended light spot 16 illuminates outwardly by considering the direction of travel X of the vehicle, that is to say in direction of vehicles capable of traveling in the opposite direction on an adjacent track. In addition, the extended spot 16 has a moderate light intensity because it is formed by a light source of the second type. This makes it possible to limit the contrast, in the sense where the light intensity transition between the unlit area and the extended spot 16 is relatively smooth.
On a représenté en figure 4 par un premier contour 20 un profil en intensité idéal imposé et par un second contour 22 un profil réel en intensité du faisceau lumineux 14 obtenu lorsque toutes les sources de lumière 6 sont alimentées à leur courant nominal. Les profils 20, 22 représentent l'évolution de l'intensité lumineuse en fonction de l'azimut a correspondant à la largeur angulaire prise par rapport à l'axe Z. Ces profils en intensité I sont donc mesurés le long de l'axe Y. L'invention a pour objectif de faire correspondre au mieux le profil réel 22 du faisceau lumineux 14 au profil idéal 20.  FIG. 4 shows by a first contour 20 an imposed ideal intensity profile and by a second contour 22 a real intensity profile of the light beam 14 obtained when all the light sources 6 are fed at their nominal current. The profiles 20, 22 represent the evolution of the light intensity as a function of the azimuth a corresponding to the angular width taken with respect to the Z axis. These intensity profiles I are thus measured along the Y axis. The object of the invention is to best match the real profile 22 of the light beam 14 to the ideal profile 20.
Le profil idéal 20 a généralement la forme d'une courbe en cloche, mais on pourra prévoir qu'on impose un profil idéal présentant une toute autre forme.  The ideal profile 20 generally has the shape of a bell curve, but it can be expected that imposes an ideal profile having a completely different shape.
On rappelle que k prend ici aussi une valeur égale à 2.  We recall that k here also takes a value equal to 2.
Le profil réel 22 a la forme d'une fonction constante par morceaux ou fonction en créneaux. Plus précisément, le profil réel 22 présente un palier central 24 d'intensité k.l1 ; correspondant à la zone du faisceau 14 générée par les sources de lumière 6 du premier type. Le profil réel 22 présente aussi deux paliers latéraux 26 d'intensité k.l2, correspondant aux zones du faisceau 14 générées par les sources de lumière 6 du deuxième type. Enfin, le profil réel 22 présente deux paliers intermédiaires 28 d'intensité k.^ + \2) I 2, s'étendant chacun entre le palier central 24 et un des deux paliers latéraux 26. Les paliers intermédiaires 28 correspondent aux zones, dites mixtes, du faisceau 14 dans lesquelles le faisceau 14 est constitué d'une alternance régulière de taches 9 formées par des sources du premier type et de taches 9 formées par des sources 8 du deuxième type. On pourra toutefois prévoir que les paliers intermédiaires 28 n'existent pas, de sorte que le palier central 24 soit juxtaposé aux deux paliers latéraux 26. The actual profile 22 has the form of a piecewise constant function or slot function. More precisely, the real profile 22 has a central bearing 24 of intensity kl 1; corresponding to the zone of the beam 14 generated by the light sources 6 of the first type. The actual profile 22 also has two lateral bearings 26 of intensity kl 2 , corresponding to the zones of the beam 14 generated by the light sources 6 of the second type. Finally, the actual profile 22 has two intermediate stages 28 of intensity k.sub.i + 2 ) I 2, each extending between the central bearing 24 and one of the two lateral bearings 26. The intermediate bearings 28 correspond to the zones, called mixed, beam 14 in which the beam 14 consists of a regular alternation of spots 9 formed by sources of the first type and spots 9 formed by sources 8 of the second type. However, provision may be made for the intermediate bearings 28 not to exist, so that the central bearing 24 is juxtaposed with the two lateral bearings 26.
Les valeurs de et \2 dépendent évidemment des luminances des sources de lumière 6 des premier et deuxième types, mais également des contraintes de style du cahier des charges et donc de la taille imposée pour les moyens optiques associés à chaque type de source. Ainsi, une réduction de la taille des moyens optiques 8 des modules d'éclairage 4 entraine la réduction de l'intensité lumineuse des taches lumineuses 9 formées. Il va de soi dans le contexte de la présente invention que toutes les sources d'un même type ont une intensité I sensiblement identique, aux tolérances de fabrication près, résultant d'une combinaison de la luminance définie pour le type de source considéré avec une taille de moyens optiques donnée, homogène, qui est la même pour toutes les sources d'un type. Pour des raisons de choix de style, la taille des moyens optiques pour les deux types de source peut être la même ou bien être différente. The values of and \ 2 obviously depend on the luminances of the light sources 6 of the first and second types, but also the style constraints of the specifications and therefore the size imposed for the optical means associated with each type of source. Thus, a reduction in the size of the optical means 8 of the lighting modules 4 causes the reduction of the luminous intensity of the light spots 9 formed. It goes without saying in the context of the present invention that all the sources of the same type have a substantially identical intensity I, with manufacturing tolerances, resulting from a combination of the luminance defined for the type of source considered with a given size of optical means, homogeneous, which is the same for all sources of a type. For reasons of style choice, the size of the optical means for the two types of source may be the same or different.
Les profils idéal 20 et réel 22 tels qu'illustrés en figure 4 présentent des points communs qui correspondent à une réalisation optimisée du faisceau lumineux réel 14.The ideal and real profiles 22 as illustrated in FIG. 4 have common points that correspond to an optimized embodiment of the real light beam 14.
En effet, ces points marquent des seuils d'intensité nécessaire et suffisante en deçà desquelles les paliers 24, 26, 28 ne peuvent pas être abaissés davantage sans que l'intensité du faisceau 14 ne devienne insuffisante localement. De plus, le fait que le profil réel 22 soit en tout point supérieur ou égal au profil idéal 20 indique le respect du cahier des charges imposé. Indeed, these points mark thresholds of necessary and sufficient intensity below which the bearings 24, 26, 28 can not be further lowered without the intensity of the beam 14 becomes insufficient locally. In addition, the fact that the real profile 22 is in all points greater than or equal to the ideal profile 20 indicates compliance with the specifications imposed.
On va maintenant détailler, en se référant à l'exemple décrit, la méthode de détermination des nombres optimaux de sources de lumière 6 du premier type et du deuxième type, ainsi que les étendues des différents paliers 24, 26, 28, le profil idéal 20 étant imposé et la taille des moyens optiques associés à chaque type de source étant également imposée..  We will now detail, with reference to the example described, the method of determining the optimal numbers of light sources 6 of the first type and the second type, as well as the expanses of the different bearings 24, 26, 28, the ideal profile. 20 being imposed and the size of the optical means associated with each type of source is also imposed.
Le procédé décrit ci-après vise à dimensionner le système d'éclairage 2 de façon optimisée en déterminant le nombre minimal de sources de lumière 6 du premier type, nécessaire pour respecter le cahier des charges, afin de minimiser le coût et la puissance installée, c'est-à-dire la puissance disponible « en réserve » ou potentiellement atteignable qui est obtenue lorsque toutes les sources sont alimentées à leur courant nominal. Dans certains cas et afin de simplifier le système d'éclairage 2 en limitant le nombre de pièces distinctes en vue d'une standardisation des modules 4 qu'il comprend, il sera envisageable d'augmenter le ratio entre le nombre de sources de lumière 6 de forte luminance et le nombre de sources de lumière 6 de luminance modérée.  The method described below aims at dimensioning the lighting system 2 in an optimized manner by determining the minimum number of light sources 6 of the first type, necessary to meet the specifications, in order to minimize the cost and the installed power, that is to say the available power "in reserve" or potentially achievable that is obtained when all sources are powered at their nominal current. In some cases and in order to simplify the lighting system 2 by limiting the number of separate rooms for standardization modules 4 it understands, it will be possible to increase the ratio between the number of light sources 6 high luminance and the number of light sources 6 of moderate luminance.
Les formules de calcul ont été établies pour un mode de réalisation préféré, où les bandes lumineuses 9 se superposent sur la moitié de leur largeur angulaire (autrement dit, k = 2). Une transposition directe de ce procédé permettra à l'homme de l'art de traiter les cas où k prend d'autres valeurs, par exemple 1 ou 3.  The calculation formulas have been established for a preferred embodiment, where the light bands 9 are superimposed on half of their angular width (that is, k = 2). Direct transposition of this method will enable those skilled in the art to deal with cases where k takes other values, for example 1 or 3.
On se place dans le contexte d'une forme classique de profil demandé par le cahier des charges, à savoir une courbe en cloche. On prendra ici également l'hypothèse que la taille des moyens optiques associés à un type de source est homogène pour le type de source considéré. We put ourselves in the context of a classic form of profile requested by the notebook loads, namely a bell curve. It will also be assumed here that the size of the optical means associated with a source type is homogeneous for the type of source considered.
On utilise dans la suite les notations employées dans les figures 4 et 5. Un paramètre Δ du système d'éclairage 2 est notamment illustré en figure 5. Le paramètre Δ est la distance entre l'axe Z et le centre du pixel éclairant dans l'axe du système d'éclairage. Le centre du pixel est représenté par un trait en pointillé 40.  In the following, the notations used in FIGS. 4 and 5 are used. A parameter Δ of the lighting system 2 is notably illustrated in FIG. 5. The parameter Δ is the distance between the axis Z and the center of the illuminating pixel in FIG. axis of the lighting system. The center of the pixel is represented by a dashed line 40.
Dans ce qui suit, on note [xj. la partie entière par excès d'un nombre réel x. In what follows, we note [xj . the whole part by excess of a real number x.
Les angles ax et a6 délimitent l'étendue totale de la zone du faisceau lumineux 14 à couvrir à l'aide des bandes lumineuses 9. The angles a x and a 6 delimit the total extent of the zone of the light beam 14 to be covered by means of the light strips 9.
Les angles 2 et 5 délimitent l'étendue de la zone du faisceau lumineux 14 pour laquelle l'intensité requise par le cahier des charges est supérieure à 2I2. Dans cette zone, 212 n'est pas suffisant en puissance installée pour respecter le cahier des charges. Il faut donc une puissance installée de It + I2. The angles 2 and 5 define the extent of the area of the light beam 14 for which the intensity required by the specifications is greater than 2I 2 . In this zone, 21 2 is not sufficient in installed power to meet the specifications. It requires an installed power of I t + I 2 .
Les angles 3 et 4 délimitent l'étendue de la zone du faisceau lumineux 14 pour laquelle l'intensité requise par le cahier des charges est supérieure à lt + 12. Dans cette zone, It + 12 n'est pas suffisant en puissance installée pour respecter le cahier des charges. Il faut donc une puissance installée de 2lx . The angles 3 and 4 define the extent of the zone of the light beam 14 for which the intensity required by the specifications is greater than 1 t + 1 2 . In this zone, I t + 1 2 is not sufficient in installed power to comply with the specifications. It requires an installed power of 2l x .
On appelle Imax la valeur maximale de l'intensité du profil idéal 20 défini par le cahier des charges. I max is the maximum value of the intensity of the ideal profile defined by the specifications.
Conditions d'existence des formules de calcul : Conditions of existence of calculation formulas:
3≤ 0 < 4 : 3≤ 0 < 4 :
Dans le cas où cette condition ne serait pas remplie, on opérera un changement de repère pour s'y rapporter.  In the event that this condition is not fulfilled, a reference change will be made to refer to it.
a1≤ a2≤ a3 et a4≤ a5 pour la zone mixtea 1 ≤ a 2 ≤ a 3 and a 4 ≤ a 5 for the mixed zone
1≤ a2 et a5≤ a6 pour la zone LED 1≤ a 2 and a 5 ≤ a 6 for the LED zone
Cas 1 Ii + I2 < Imax < 2 i Case 1 I i + I 2 <Imax <2 i
Ce cas décrit l'existence d'une zone du faisceau lumineux 14 intégralement formée par des sources de lumière 6 du premier type.  This case describes the existence of a zone of the light beam 14 integrally formed by light sources 6 of the first type.
Nombre total de sources du deuxième type. Total number of sources of the second type.
Le nombre total de sources de lumière 6 du deuxième type est donné par la somme du nombre de sources du deuxième type dans la zone du faisceau lumineux entièrement formé par des sources du deuxième type et du nombre de sources du deuxième type dans la zone mixte. Nombre de sources du deuxième type dans la zone entièrement formée par des sources du deuxième type : The total number of light sources 6 of the second type is given by the sum of the number of sources of the second type in the zone of the light beam entirely formed by sources of the second type and the number of sources of the second type in the mixed zone. Number of sources of the second type in the zone entirely formed by sources of the second type:
Nombre de sources du deuxième type d'un premier côté de la zone mixte :  Number of sources of the second type on the first side of the mixed zone:
-+Δ-α2 -+Δ-α3 - + Δ-α 2 - + Δ-α 3
Si le nombre de pixels entre oc2 et κ3 est pair : 1 + - - 1 If the number of pixels between oc 2 and κ 3 is even: 1 + - - 1
Si le nombre de pixels entre oc2 et κ3 est impair :If the number of pixels between oc 2 and κ 3 is odd:
Nombre de sources du deuxième type d'un second côté de la zone mixte :  Number of sources of the second type on the second side of the mixed zone:
-+A-as -+A-a6 - + Aa s - + Aa 6
Si le nombre de pixels entre oc5 et oc6 est pair : 1 + - - 1 If the number of pixels between oc 5 and oc 6 is even: 1 + - - 1
Si le nombre de pixels entre oc5 et oc6 est impair :If the number of pixels between oc 5 and oc 6 is odd:
Nombre total de sources du premier type. Total number of sources of the first type.
Le nombre total de sources de lumière 6 du premier type est donné par la somme du nombre de sources du premier type dans la zone entièrement formée par des sources du premier type et du nombre de sources du premier type dans la zone mixte.  The total number of light sources 6 of the first type is given by the sum of the number of sources of the first type in the zone entirely formed by sources of the first type and the number of sources of the first type in the mixed zone.
Nombre de sources du premier type la zone entièrement formée par des sources du premier type : Number of sources of the first type the zone entirely formed by sources of the first type:
Nombre de sources du premier type d'un premier côté de la zone mixte :  Number of sources of the first type on one side of the mixed zone:
Si le nombre de pixels entre oc2 et oc3 est pair : f f If the number of pixels between oc 2 and oc 3 is even: ff
-+Δ-α2 -+Δ-α3 - + Δ-α 2 - + Δ-α 3
Si le nombre de pixels entre oc2 et oc3 est impair : - If the number of pixels between oc 2 and oc 3 is odd: -
Nombre de sources du premier type d'un second côté de la zone mixte : Number of sources of the first type on the second side of the mixed zone:
Si le nombre de pixels entre If the number of pixels between
Si le nombre de pixels entre  If the number of pixels between
Cas 2 : 2/2 < Imax≤ + I2 Case 2: 2/2 <I max + I 2 ≤
Ce cas décrit l'absence d'une zone du faisceau lumineux 14 intégralement formée par des sources de lumière 6 du premier type. Nombre total de sources du deuxième type. This case describes the absence of an area of the light beam 14 integrally formed by light sources 6 of the first type. Total number of sources of the second type.
Le nombre total de sources de lumière 6 du deuxième type est donné par la somme du nombre de sources du deuxième type dans la zone entièrement formée par des sources du deuxième type et le nombre de sources du deuxième type dans la zone mixte.  The total number of light sources 6 of the second type is given by the sum of the number of sources of the second type in the zone entirely formed by sources of the second type and the number of sources of the second type in the mixed zone.
Nombre de LED dans la zone 100% LED : Number of LEDs in the 100% LED zone:
Nombre de sources du deuxième type dans la zone mixte : Si le nombre de pixels entre oc2 et oc5 est pair : Number of sources of the second type in the mixed zone: If the number of pixels between oc 2 and oc 5 is even:
Si le nombre de pixels entre oc2 et oc5 est impair :If the number of pixels between oc 2 and oc 5 is odd:
Nombre total de sources du premier type. Total number of sources of the first type.
Le nombre total de sources de lumière 6 du premier type est donné par le nombre de sources du premier type dans la zone mixte.  The total number of light sources 6 of the first type is given by the number of sources of the first type in the mixed zone.
Nombre de sources du premier type dans la zone mixt  Number of sources of the first type in the mixed zone
Si le nombre de pixels entre oc2 et oc5 est pair : If the number of pixels between oc 2 and oc 5 is even:
Si le nombre de pixels entre oc2 et oc5 est impair : 1 +If the number of pixels between oc 2 and oc 5 is odd: 1 +
Le ratio obtenu entre les nombres de sources des premier et deuxième types permet d'optimiser la puissance utile du système d'éclairage, c'est-à-dire la puissance nécessaire pour atteindre le cahier des charges en performances. En d'autres termes, on a ajusté les puissances dans les différents modules afin de « rapprocher » le profil réel 22 du profil d'intensité 20 visé dans le cahier des charges.  The ratio obtained between the numbers of sources of the first and second types makes it possible to optimize the useful power of the lighting system, that is to say the power necessary to reach the specifications in performances. In other words, the powers in the various modules have been adjusted in order to "bring the actual profile 22 closer to the intensity profile 20 referred to in the specifications.
On notera que plus la discrétisation du faisceau lumineux 14 est fine, c'est-à-dire plus les valeurs de β et aL sont petites, plus le rendement d'utilisation du système d'éclairage 2 s'approchera de 1 et plus le système d'éclairage 2 sera optimisé. L'optimisation est également accrue si le nombre de types de modules différents à disposition est important. Note that the greater the discretization of the light beam 14 is fine, that is to say the more the values of β and L are small, the higher the efficiency of use of the lighting system 2 will approach 1 and more the lighting system 2 will be optimized. Optimization is also increased if the number of different types of modules available is important.
On va maintenant présenter un exemple de réalisation non limitatif de l'invention, montrant que le système d'éclairage de l'invention est particulièrement optimisé. Les hypothèses de ce mode sont les suivantes :  We will now present a non-limiting embodiment of the invention, showing that the lighting system of the invention is particularly optimized. The assumptions of this mode are as follows:
- le système d'éclairage comprend dix modules, - les dimensions des moyens optiques (et donc celles des modules) sont imposées et sont telles que l'utilisation exclusive de sources de lumière du premier type ne permet pas de respecter le cahier des charges pour la performance, c'est-à-dire faire correspondre le profil 22 du faisceau lumineux 14 au profil idéal 20 imposé, et - the lighting system comprises ten modules, - The dimensions of the optical means (and therefore those of the modules) are imposed and are such that the exclusive use of light sources of the first type does not meet the specifications for performance, that is to say match the profile 22 of the light beam 14 to the ideal profile 20 imposed, and
- en sortie d'un module du premier type, comprenant uniquement des sources du premier type, lorsque ses sources de lumière 6 sont alimentées à leur courant nominal, l'intensité lumineuse vaut 35% de celle atteinte par un module du deuxième type, comprenant uniquement des sources du deuxième type, lorsque ses sources de lumière 6 sont alimentées à leur courant nominal.  at the output of a module of the first type, comprising only sources of the first type, when its light sources are supplied with their nominal current, the luminous intensity is 35% of that reached by a module of the second type, comprising only sources of the second type, when its light sources 6 are fed at their nominal current.
Si on choisit que tous les modules sont du premier type, c'est-à-dire qu'ils comprennent tous une source de lumière du premier type, on suppose que la meilleure alimentation en courant des sources rapportée au courant nominal est la suivante : 20%, 37%, 100%, 100%, 100%, 80%, 50%, 34%, 15% et 19%, la dernière source alimentée à 19% formant une tache lumineuse d'ambiance de forme de voile de navire. Dans ce cas, le rendement d'utilisation, qui on le rappelle est défini comme étant la puissance utile rapportée à la puissance installée, vaut 56%.  If it is chosen that all the modules are of the first type, that is to say that they all include a light source of the first type, it is assumed that the best current supply of the sources relative to the nominal current is the following: 20%, 37%, 100%, 100%, 100%, 80%, 50%, 34%, 15% and 19%, the last source fueled at 19% forming a vessel veil form ambient light spot . In this case, the efficiency of use, which is recalled is defined as being the useful power compared to the installed power, is worth 56%.
Si on choisit plutôt d'opter pour le système d'éclairage de l'invention, la méthode de détermination des nombres de sources de lumière 6 des premier et second type conduit à adopter la configuration suivante :  If one chooses rather to opt for the lighting system of the invention, the method of determining the numbers of light sources 6 of the first and second type leads to adopt the following configuration:
- source 1 : type 2, alimentée à 60% du courant nominal.  - source 1: type 2, supplied at 60% of rated current.
- source 2 : type 2, alimentée à 100% du courant nominal.  - source 2: type 2, supplied at 100% rated current.
- source 3 : type 1 , alimentée à 100% du courant nominal.  - source 3: type 1, supplied at 100% of the rated current.
- source 4 : type 1 , alimentée à 100% du courant nominal.  - source 4: type 1, supplied at 100% rated current.
- source 5 : type 1 , alimentée à 100% du courant nominal.  - source 5: type 1, supplied at 100% rated current.
- source 6 : type 1 , alimentée à 80% du courant nominal.  - source 6: type 1, supplied at 80% of the nominal current.
- source 7 : type 1 , alimentée à 50% du courant nominal.  - source 7: type 1, supplied at 50% of nominal current.
- source 8 : type 1 , alimentée à 35% du courant nominal.  - source 8: type 1, supplied at 35% of rated current.
- source 9 : type 2, alimentée à 40% du courant nominal.  - source 9: type 2, supplied at 40% of rated current.
- source 10 (pour obtenir une tache lumineuse d'ambiance de forme de voile de navire : type 2, alimentée à 60% du courant nominal.  - source 10 (to obtain a vessel-shaped ambient light spot: type 2, powered at 60% of the rated current.
Dans ce cas, le rendement d'utilisation est égal à 74%. On observe ainsi que le rendement d'utilisation est considérablement accru en passant de la première configuration à la seconde configuration. Autrement dit, on utilise de façon plus optimale la puissance installée dans le système d'éclairage.  In this case, the efficiency of use is equal to 74%. It is thus observed that the utilization efficiency is considerably increased by passing from the first configuration to the second configuration. In other words, the power installed in the lighting system is used more optimally.
Bien entendu, on pourra apporter à l'invention de nombreuses modifications sans sortir du cadre de celle-ci.  Of course, we can bring to the invention many changes without departing from the scope thereof.

Claims

REVENDICATIONS
1 . Système d'éclairage (2) pour véhicule automobile, pour émettre un faisceau lumineux (14) comprenant au moins deux zones éclairées chacune générée par au moins une source de lumière (6) et des moyens optiques (8) agencés de manière à former une tache lumineuse (9) à partir de la lumière émise par la source de lumière (6), chaque tache (9) ayant une forme générale de bande lumineuse, notamment de forme générale rectangulaire, 1. Lighting system (2) for a motor vehicle, for emitting a light beam (14) comprising at least two illuminated areas each generated by at least one light source (6) and optical means (8) arranged to form a light source light spot (9) from the light emitted by the light source (6), each spot (9) having a general shape of luminous band, in particular of generally rectangular shape,
caractérisé en ce qu'il comprend au moins deux types de sources de lumière, appelés premier et deuxième types de sources de lumière, les sources de lumière (6) d'un même type ayant sensiblement une même luminance, et  characterized in that it comprises at least two types of light sources, called first and second types of light sources, the light sources (6) of the same type having substantially the same luminance, and
la luminance d'une source de lumière (6) du premier type étant 2 à 10 fois supérieure à celle d'une source de lumière (6) du deuxième type.  the luminance of a light source (6) of the first type being 2 to 10 times higher than that of a light source (6) of the second type.
2. Système d'éclairage (2) selon la revendication précédente, dans lequel la luminance d'une source de lumière (6) du premier type est 3 à 5 fois supérieure à celle d'une source de lumière (6) du deuxième type. 2. Lighting system (2) according to the preceding claim, wherein the luminance of a light source (6) of the first type is 3 to 5 times greater than that of a light source (6) of the second type .
3. Système d'éclairage (2) selon l'une quelconque des revendications précédentes, dans lequel les taches lumineuses (9) sont toutes de formes sensiblement identiques et sensiblement parallèles à une direction principale commune. 3. Lighting system (2) according to any one of the preceding claims, wherein the light spots (9) are all substantially identical shapes and substantially parallel to a common main direction.
4. Système d'éclairage (2) selon la revendication précédente, dans lequel les taches lumineuses (9) se superposent partiellement. 4. Lighting system (2) according to the preceding claim, wherein the light spots (9) overlap partially.
5. Système d'éclairage (2) selon la revendication précédente, dans lequel deux taches lumineuses (9) consécutives du faisceau lumineux (14) se superposent sur la moitié de la largeur des taches lumineuses (9). 5. Lighting system (2) according to the preceding claim, wherein two consecutive light spots (9) of the light beam (14) are superimposed on half the width of the light spots (9).
6. Système d'éclairage (2) selon l'une quelconque des revendications 3 à 5, dans lequel le faisceau (14) comprend au moins une zone (28) dans laquelle il est constitué d'une alternance régulière de taches (9) formées par des sources (6) du premier type et de taches (9) formées par des sources (6) du deuxième type. 6. Lighting system (2) according to any one of claims 3 to 5, wherein the beam (14) comprises at least one zone (28) in which it consists of a regular alternation of spots (9). formed by sources (6) of the first type and spots (9) formed by sources (6) of the second type.
7. Système d'éclairage (2) selon l'une quelconque des revendications précédentes, dans lequel les sources de lumière (6) du premier type sont des diodes laser. The lighting system (2) according to any of the preceding claims, wherein the light sources (6) of the first type are laser diodes.
8. Système d'éclairage (2) selon l'une quelconque des revendications précédentes, dans lequel les sources de lumière (6) du deuxième type sont des diodes électroluminescentes. 8. Lighting system (2) according to any one of the preceding claims, wherein the light sources (6) of the second type are light emitting diodes.
9. Système d'éclairage (2) selon l'une quelconque des revendications précédentes, dans lequel le faisceau (14) comprend, à au moins une de ses deux extrémités latérales, une tache lumineuse étendue (16) de largeur supérieure à celle des autres taches lumineuses (9). 9. lighting system (2) according to any one of the preceding claims, wherein the beam (14) comprises, at least one of its two lateral ends, an extended light spot (16) of greater width than that of other light spots (9).
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Also Published As

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EP3201519B1 (en) 2022-12-07
FR3026687B1 (en) 2018-03-02
WO2016050971A1 (en) 2016-04-07
US10288241B2 (en) 2019-05-14
CN107076382B (en) 2020-06-12
US20170307162A1 (en) 2017-10-26
FR3026687A1 (en) 2016-04-08
CN107076382A (en) 2017-08-18

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